import os
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import FileResponse, JSONResponse
from contextlib import asynccontextmanager
from dotenv import load_dotenv

from database import init_db
from routes import stock, collections, shares, sectors

load_dotenv()


@asynccontextmanager
async def lifespan(app: FastAPI):
    init_db()
    yield


app = FastAPI(title="AUV API", version="1.0.0", lifespan=lifespan)

app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(stock.router, prefix="/api/stock")
app.include_router(collections.router, prefix="/api/collections")
app.include_router(shares.router, prefix="/api/share")
app.include_router(sectors.router, prefix="/api/sectors")

# 生产模式：后端同时托管前端静态文件
# catch-all 路由在 API 路由之后注册，所以 API 优先级更高
dist_path = os.path.join(os.path.dirname(__file__), "dist")
if os.path.isdir(dist_path):
    @app.get("/{full_path:path}")
    async def serve_spa(full_path: str):
        file_path = os.path.join(dist_path, full_path) if full_path else os.path.join(dist_path, "index.html")
        if os.path.isfile(file_path):
            return FileResponse(file_path)
        # SPA fallback: 非文件路径统一返回 index.html
        index_path = os.path.join(dist_path, "index.html")
        if os.path.isfile(index_path):
            return FileResponse(index_path, media_type="text/html")
        return JSONResponse({"detail": "Not Found"}, status_code=404)